Albert had 175 pears and 200 starfruits at first. He used
47 of the pears and
710 of the starfruits. He then bought some more starfruits. In the end,
15 of the fruits he had left were pears. How many starfruits did he buy?
| |
Pears |
Starfruits |
Total |
| Before |
175 |
200 |
|
| Change 1 |
- 100 |
- 140 |
|
| After 1 |
75 |
60 |
|
| Change 2 |
|
+ some |
|
| After 2 |
1 u |
4 u |
5 u |
Number of pears that Albert used
=
47 x 175
= 100
Number of pears that Albert had left
= 175 - 100
= 75
Number of starfruits that Albert used
=
710 x 200
= 140
Number of starfruits that Albert had left
= 200 - 140
= 60
Fraction of the fruits left that were starfruits
= 1 -
15=
45 Number of pears left = 1 u = 75
Number of starfruits left in the end
= 4 u
= 4 x 75
= 300
Number of starfruits that Albert bought
= 300 - 60
= 240
Answer(s): 240
